/*******************************************************************************
 * Copyright (c) 2011 GigaSpaces Technologies Ltd. All rights reserved
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package org.cloudifysource.esc.util;

import java.io.OutputStream;
import java.util.logging.Logger;

/******
 * An output stream implementation that sends all output to a JUL logger.
 * @author dank
 *
 */
public class LoggerOutputStream extends OutputStream {

	private String prefix = "";
	private final Logger logger;

	private final StringBuilder sb;

	/********
	 * Constructor.
	 * @param logger the logger to which all output will be redirected to.
	 */
	public LoggerOutputStream(final Logger logger) {
		this.logger = logger;
		sb = new StringBuilder();
	}

	@Override
	public void write(final int b) {
		final char c = (char) b;
		if (c == '\n') {
			final String s = sb.toString();
			logger.info(prefix + s);
			sb.setLength(0);
		} else {
			sb.append(c);
		}
	}

	@Override
	public void close() {
		if (sb.length() > 0) {
			write('\n');
		}
	}

	@Override
	public void flush() {

	}

	public void setPrefix(final String prefix) {
		this.prefix = prefix;
	}

}